Convert SystemTime to Local Time

#include <windows.h>
#include <stdio.h>

//int ConvertUTCToLocalTime(SYSTEMTIME *SysTime,SYSTEMTIME *LocalTime )
//{
//
//
//
//}

int main()
{
    SYSTEMTIME st, lt;
    int retval;
	TIME_ZONE_INFORMATION TimeZoneInfo;

	GetTimeZoneInformation( &TimeZoneInfo );
	GetSystemTime(&st);
	retval=SystemTimeToTzSpecificLocalTime(&TimeZoneInfo,&st,&lt);

	if(retval)
	{
       printf("The function has succeeded = %d \n",retval);
	}else
	{
		printf("The function has failed  = %d \n",retval);
	}

    //GetLocalTime(&lt);

    printf("The system time is: %02d:%02d\n", st.wHour, st.wMinute);
    printf(" The local time is: %02d:%02d\n", lt.wHour, lt.wMinute);

	/*ConvertUTCToLocalTime(&st,&lt);*/


}